This cartridge contains redundant nozzles, which help ensure consistent print quality. Nozzles are laid out in pairs, so if one becomes clogged or fails, the other continues to print.Lexmark Return Program Cartridges are sold at a discount versus the prices of regular cartridges in exchange for the customer's agreement to use the cartridge only once and return it only to Lexmark for remanufacturing or recycling. Lexmark supplies are designed for the highest quality output, page after page